fatal error: 'libDER/DERItem.h' file not found

[andrewrk]

what do you have to have installed for this to be present?

[andrewrk]

Hmm I think this may be because I am running on macOS 10.15.7 (Catalina) and you were running on Big Sur. My hunch is that we ideally want to be running fetch-them-macos-headers on the minimum supported macOS version - which is currently 10.13 but soon to be bumped to 10.14. The idea here is that macOS binaries will continue to execute after an OS upgrade, which means if you target the earlier version, it will still work on the later version, but not vice versa.

ideally ideally we would have the headers depend on the minimum target OS version in the zig target OS version range. But that might incur more complication than we intend to bear.

[prime31]

I'm seeing this with current head of zig as well on Big Sur arm64. Error shows the following:

/Users/desaro/Desktop/zig-master/build/bin/zig build tilescript
error(compilation): clang failed with stderr: In file included from /Users/desaro/zig-upaya/src/deps/sokol/compile_sokol.c:12:
In file included from /Users/desaro/zig-upaya/src/deps/sokol/sokol/sokol_app.h:1088:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Metal.framework/Headers/Metal.h:9:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Metal.framework/Headers/MTLTypes.h:8:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:87:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSURLCredential.h:9:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/Security.h:117:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/oids.h:35:10: fatal error: 'libDER/DERItem.h' file not found

[floooh]

The header 'libDER/DERItem.h' is in the macOS-SDK's usr/include subdirectory:

[path-to-macos-sdk]/usr/include/libDER/DERItem.h

The path to the macOS SDK can be queried with xcrun --show-sdk-path, e.g. on my machine this resolves to:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/libDER/DERItem.h

I fixed this by adding the [macos-sdk]/usr/include search path via LibExeObjStep.addIncludeDir, but IMHO this should happen automatically (e.g. when running the system clang, this path seems to be part of the default header search path).

PS for reference:

https://github.com/floooh/pacman.zig/blob/41dd8c28cc02eacb112ee9e455a18772c65583ca/build.zig#L7-L16

[jcelerier]

Not related to zig, but if anyone stumbles on this issue with macOS's clang and CommandLineTools on a 10.15 machine, my fix is to run clang / cmake / whatever build tool is used with :

xcrun --sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk $the_build_tool

(replace MacOSX11.1.sdk with whatever's the latest on your machine, but for me, with Xcode 12, the 10.15 SDK gives me that error even if I'm on a 10.15 machine so I guess there's a bug in some internal Xcode or macOS thing)

[andrewrk]

This is addressed by the new strategy now of shipping multiple versions via the "layers" system. Upstream issue: ziglang/zig#10215